Pressure gauging tire valve



May 19,-'1'93L F. G. ARNOLD .PRESSURE GAUG'ING TIRE VALVE Filed not; 15. 1929" f Ill/l.

.a 0 9 fb m Y d a E M Ww M n y m f EG o f v n 5 mk A Il \\\Rvz\ l., n r H, Y If IP M J B E m mi J I H| I l- H Mw, 0 fla. rf 2 v J 3 no T 40M M 0^ Il. l i h mmmllalltnmmwil Patented May 19, 1931 FRANK G. ARNOLD, or NEW YORK, N. Y.

` PRESSURE GAUGING TIRE VALVE Application filed October 15, 1929. Serial No. 399,824.

rlhis invention relates to improvements in tire valves and its leading object is to provide a .tirevalve with a pressure gauge including a pressure responsive indicating ,z tuhe, and an air releasing spring rod working through this gauge, by the manipulation of which the air may be allowed to be discharged, when it is desired to deflate the tire,

and which will yield inwardly under'the ini-J fiuence of air pressureemployed to inflate the tire. Y

A further object of the invention is the provisionof aconibined tire valve and pressure gauge with means for sealing the movable parts against air leakage.

n Other objects and advantages of thel invention will be hereinafter specifically pointed out, or will become apparent, as the specication proceeds.

With the above indicated objects in view, thev` invention resides in certain novel construction and combination and arrangement of parts, clearly described in the following specification and fully illustrated in the ac- 25 companying drawings, which latter shows an A embodiment of the invention as at present preferred.'

Fig. 1 is a vertical sectional view through a combined air valve for tires and pressure gauge- .135 line Lit- 4 of Fig. 1, looking in the direction `of the arrows.

- Referring to the accompanying drawings in detail 5 designates a cylindrical tube formed with an integral base flange 6, which is p'rovided with an encircling groove 6a on its outer side, and with an internally threaded recess 6b on its bottom side. This tube is formed with an external thread 5a, which extends the length thereof, while the upper end of the tube is reduced by a conical extension 7 which terminates in a normally open circular nipp A dished washerv9 is disposed around the tube 5 and is formed with an inwardly offset 59 portion 9 which is designed to force the elastic rubber wall 1() of the inner tube into the groove 6a of the base 6. This washer is held in compressing relation to the rubber wall 10 by means of the lock nut 11. A nut A12 having a conical boss 12a is also threaded on the tube 55 5 to clamp a wheel rim against the lock nut and washer.

`A metal disc 13 is threaded inthe recess 6b and is provided with a central air port or ap? erture 13a. Over this disc the pressure re 60 sponsive tubular plunger14 is mounted to slide inside the smooth bore wall of the tube 5. This plunger is formed with a central integral post 15, the lower end. of which is formed with'a conical seat 15a. The conical 65 valve 17 on the stem 16 is arranged to engage the rubber gasket 16a disposed on the seat 15a. This stem 16 has a loose sliding lit in the central passage of the post 15, and said stem extends above the upperend of the post 15, to be manipulated by hand when it isdesired to deflate the tire.

A bushing 18 is threaded to the lower iend of the tubular plunger 14, and is provided with a central air port or aperture 18a which 75 is normally open and which registers with the port or aperture 13ul of the disc 13V. A coil spring 19 is disposed between the valve 17 and the base of the bushing 18, and exerts tension against the valve to hold the same seated against leakage against the gasket 16a, which is thereby held seated against leakage against the seat 15a of the central post 15 of pluri ger 14.

The tubular outer wall of the plunger 14- is 85 enlarged at its upper end to provide a shoulder 14a against which theV coil spring 20 bears at its lower end.

The upper end of the coil spring engages the sleeve 21, which is held by the tension of the spring 20 against the soft rubber washer 22, which engages the conical plug 23 nested in the conical extension of the tube 5. This plug 23 is provided with a central opening through which the 'post' 15 has a sliding fit. 95 A soft rubber washer 23a is disposed against the upper conical side of theplug 23. Y

e The upper end ofthe tubullarpost 15 has a sliding fit in the nipple 8. y The post 15 is formed with an integral shoulder 15d which 10" e vided Withgauge markings 26, `which are ari is provided With a dovetail recess e in which the VloWer end of the resilient preferably soft rubber sleeve'24 is interlocked.

This resilient rubber sleeve is formed With a slightly taperinginn'er surface Which has a snug sliding lit with the exterior conical surface laof the hard rubber sleeve 25, the upper yend of which isinterlocked withV the sleeve 21,"and held thereby in spaced relation from the post l5. l v

" .The upper end of the tubularpostl 'isproranged in the form of figures giving different degreesV of pressure, and as shown indicate pressures rising by five pounds from 25 lbs. ,to,50l,bs.; 'u i Q When'thetireiniiating hose'lis attached i tothe nipple 8 'and air under pressure is forced into the tire it Will pass through the central Y passage'vrof` the post 15,'thus 'displacing-the valve '17 from its 'seat,7and enter the tire tube 10 by means ofthe` opposed openings 13a and 18a. 'When inflating pressure is stopped the air under pressure in the innertubewill"force thejvvholetubular-plunger 14 outvvardlyintheltube, thereby compressing themain gauge spring 20, andlplacing the lovverrubber .sleeve24 under tension, duetothe tapering innerlfsuriface thereof being contacted With andforced tig-ht against the exterior conical surface 25a loi:- the sleevev 25.V Y The par'tsg24;

Y and 25then form an airetightgjoint against i vair-pressure from the'tube which may leak,

, toward thenipp'le'S, up "alongside plunger lll,

VYandfvvhich air pressure', because blocked for outletf at the'awa'sher 23a,might yothervv'ise leak up alongside post 15 kfor escape from saidnipplel.; The'greatert'he-air pressure in 'Y t theninnertubethefgreater lWill berthe out- Ward movement of theftubular plunger. As

' inner and outer'v'vashers 22 and 23a. 'Since lthe tubular plunger is always under the inluenceof the tire airlpressureV its position feo the rod with it. i Air is prevented this-plunger vmoves outwardly it Will carry from leaking through the upon the inner post 15.

transparent observation windows through Which the indicated air pressure may be read The hereinbefore described construction admits of considerable modiicationwithout departing from the invention; jtherefore,l donot Wish to be limited to the precise arrangements shown andde'scribed, which are, Y

as aforesaid, by Way of illustration merely.

V,In other. Words, the scopeof protection contemplated i'stobe taken solely from the appended claim, interpreted as broadlyas 1s consistent vvith'the prior art. 7

lV claim as new n n In an air valve comprising a holding tube having a slidable plunger, sliding movement ofthe plunger being responsive to'air pressure in the tube,a sleeve positioned in the'tube andl i engaged in said second recess and having also a free' tapered terminaLsaid'latter ter-k minal being of greater diameter than said first terminal, whereby on Irelative sliding] movement of said plunger and said holding. tube, saidresilient terminal is elect'ive to embracesaid rigid terminalforsealing the oint between said plungerfandsaid sleeve., f

In testimonyv vvhereoflVV *hereby alix A Signatura* i le.; ARNOLD;

central passage'of the post l5 by the valve f 1 7 vvhenthe 4'Yv'alveis seated and/air is prevented romleakin'g throughthe holding tube" by the action'off the Aconical plug'23 andfthe Withreference to the nipple 8j will correctly gauge theforceofthe tire 'air pre'ssurei y 'A dust cap 27 is threadedlon the tube v5, Which Atherefore forms a post.'v 1 This dust vcap internally threaded yto engage: the external threads of the post :5, and is equipped with the set screw 28. From l'this base ring the spiderorlopen rame29 rises, the upper end ofvvhich'terminates in ari-integral capjor end W'a111'29a. *'fWith'in this 'frame a transparent *ijs provided'wah the-mailing Qmwhichis tube 30 of Celluloid orsimilar: material may ,Y

- d'esirably be'edisposed, rsuch tube preferably havingacloset therein. g ThisY transparent tuloyeithlls,l inployedl'will Provide'a seriesfof f '5 'v '-l' 

